fix some typos

src/test/ui/generic-associated-types/bugs/issue-91762.rs

@@ -1,7 +1,7 @@
 // check-fail
 // known-bug
 
-// We almost certaintly want this to pass, but
+// We almost certainly want this to pass, but
 // it's particularly difficult currently, because we need a way of specifying
 // that `<Self::Base as Functor>::With<T> = Self` without using that when we have
 // a `U`. See `https://github.com/rust-lang/rust/pull/92728` for a (hacky)

src/test/ui/let-else/let-else-non-diverging.rs

@@ -11,7 +11,7 @@ fn main() {
 
     // Ensure that uninhabited types do not "diverge".
     // This might be relaxed in the future, but when it is,
-    // it should be an explicitly wanted descision.
+    // it should be an explicitly wanted decision.
     let Some(x) = Some(1) else { foo::<Uninhabited>() }; //~ ERROR does not diverge
 }
 

src/test/ui/traits/trait-upcasting/multiple-occurrence-ambiguousity.stderr

@@ -1,5 +1,5 @@
 error[E0308]: mismatched types
-  --> $DIR/multiple-occurence-ambiguousity.rs:21:26
+  --> $DIR/multiple-occurrence-ambiguousity.rs:21:26
    |
 LL |     let t: &dyn Bar<_> = s;
    |            -----------   ^ expected trait `Bar`, found trait `Foo`